朗科科技（300042）公告，2024年营业收入8.29亿元，同比下降23.73%。归属于上市公司股东的净亏损 9924.88万元，去年同期净亏损4376.42万元。基本每股收益-0.4953元/股。公司计划不派发现金红利，不 送红股，不以公积金转增股本。 ...

Core Viewpoint - The article discusses the complexity and confusion surrounding various storage card standards and types, emphasizing the need for consumers to understand these differences when purchasing storage cards for their devices [3][11][60]. Group 1: Storage Card Evolution - The evolution of storage cards began with the introduction of NOR and NAND flash memory technologies in the 1980s, leading to the first compact flash card in 1994 [15][17]. - The introduction of the SD card in 1999, as a response to Sony's proprietary Memory Stick, marked a significant shift in the market, with SD cards quickly gaining popularity due to their lower cost and open standards [28][34]. - The SD card has undergone multiple iterations, including SDHC, SDXC, and SDUC, expanding its maximum capacity from 2GB to 128TB [38][39]. Group 2: Types and Standards - Storage cards are categorized into three main types of markings: capacity, performance, and manufacturer-specific marketing terms [35]. - The article highlights the importance of matching the storage card's capacity and speed with the device's requirements, as older devices may only support certain standards [37][45]. - Different speed classes (Class, UHS, and Video Speed Class) are essential for determining the card's performance, especially for high-resolution video recording [48][50][51]. Group 3: Consumer Guidance - Consumers are advised to check their device specifications before purchasing a storage card to ensure compatibility with the required standards [45][63]. - The article suggests that for photography and videography, speed ratings and performance classes should be prioritized, while for general file storage, alternatives like USB drives may be more suitable [56][59]. - The complexity of storage card standards necessitates a clearer labeling system to reduce consumer confusion and improve purchasing decisions [62][64].

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